CoCoA Project

31 May 2024

17:07 CoCoALib Feature #1743: Implement Truncated GBases for homogeneous input

John Abbott wrote:
> Is it worth putting the ex-bug (mentioned in comment 6 above) as a genuine exbug test?
hmmm,... Anna Maria Bigatti

30 May 2024

17:43 CoCoALib Feature #1819 (In Progress): New functions in CoCoALib using GBasisTrunc: MinSubsetOfGens, IsContainedTrunc, ..

We have in CoCoA-5
+ MinSubsetOfGens
+ IsContainedTrunc(I,J)
using GBasisTrunc (if homogenous and not(HasGBasis(J)... Anna Maria Bigatti

17:38 CoCoALib Bug #1740 (Feedback): MinGens gives non minimal gens *if some deg=0*

Anna Maria Bigatti

17:22 CoCoALib Bug #1740 (Resolved): MinGens gives non minimal gens *if some deg=0*

A clever implementation is difficult/impossible.
However, the new @GBasisTrunc@ (which also works for non-negative g... Anna Maria Bigatti

11:33 CoCoALib 6.00 hours (Bug #1740 (Feedback): MinGens gives non minimal gens *if some deg=0*)

Anna Maria Bigatti

11:33 CoCoALib Bug #1740: MinGens gives non minimal gens *if some deg=0*

This is how the usual MinGens labelling can go horribly wrong with *non-negative* gradings:
S := NewPolyRingWeight... Anna Maria Bigatti

17:17 CoCoALib Feature #1743: Implement Truncated GBases for homogeneous input

There was a bug in GBasisTrunc, now fixed.
These functions are in CoCoA-5. Port them to CoCoALib:
+ MinSubsetOfG... Anna Maria Bigatti

11:28 CoCoALib 0.50 hour (Feature #1742 (Resolved): MinGens could be faster)

Anna Maria Bigatti

11:28 CoCoALib Feature #1742 (Resolved): MinGens could be faster

Resolved using truncation (works also for non-negative gradings) Anna Maria Bigatti

28 May 2024

17:48 CoCoALib 0.20 hour (Design #1689 (Closed): Automatic mapping of RHS in += etc)

Anna Maria Bigatti

17:48 CoCoALib Design #1689: Automatic mapping of RHS in += etc

When we multiply or divide a polynomial by a coefficient, we can use myMulByCoeff/myDivByCoeff.
This is actually che... Anna Maria Bigatti

17:41 CoCoALib Design #1689: Automatic mapping of RHS in += etc

Is this valid now? something along this lines is valid. Anna Maria Bigatti

14:39 CoCoALib Design #1744: Implement GBMill (aka Groebner Framework)

First step would be to kill definitely all the code for the dynamic GBasis.
It is sad to do so, but I have no idea h... Anna Maria Bigatti

14:12 CoCoALib Design #1744: Implement GBMill (aka Groebner Framework)

John Abbott wrote:
> *THIS* could be a good goal for version 1.0. Do we have enough resources to achieve that?
I... Anna Maria Bigatti

14:11 CoCoALib Feature #1743: Implement Truncated GBases for homogeneous input

MinGens now truncates to the max degree of the generators.
Can be considerably faster than before, of course.
Anna Maria Bigatti

14:09 CoCoALib Feature #1743: Implement Truncated GBases for homogeneous input

Implemented.
Meanwhile I made a few tiny changes in the direction of the Framework/Mill.
Tested, seems fine.
Now... Anna Maria Bigatti

14:09 CoCoALib 7.00 hours (Feature #1743 (In Progress): Implement Truncated GBases for homogeneous input)

Anna Maria Bigatti

27 May 2024

16:46 CoCoALib Feature #1743 (In Progress): Implement Truncated GBases for homogeneous input

One crucial starting point is making a proper constructor for GRingInfo.
Currently the constructor has many argument... Anna Maria Bigatti

16:46 CoCoALib 1.00 hour (Feature #1743 (In Progress): Implement Truncated GBases for homogeneous input)

Anna Maria Bigatti

24 May 2024

16:40 CoCoA-5 Support #1650: Potentially confusing prompt: waiting for semicolon

John Abbott wrote:
> Anna suggests
> *@[[waiting for ";"]]@*
checked in @LineProviders.C@ Anna Maria Bigatti

16:33 CoCoALib Bug #1740: MinGens gives non minimal gens *if some deg=0*

While trying to understand how to work around this, I resumed the partial minimalization with the function @MinGens_a... Anna Maria Bigatti

16:33 CoCoALib 1.00 hour (Bug #1740 (Feedback): MinGens gives non minimal gens *if some deg=0*)

Anna Maria Bigatti

14:55 CoCoALib Bug #1705: ProgressReporter: prepare for new loop?

John Abbott wrote:
> Or *@myRestart@*?
@myReset@ is myFavourite ;-) Anna Maria Bigatti

11:53 CoCoALib 6.00 hours (Feature #1818 (In Progress): Implement FGLM)

Anna Maria Bigatti

11:53 CoCoALib Feature #1818 (In Progress): Implement FGLM

Done, together with Evelina Lanteri.
We used LinDepMill and QBGenerator: worked very well.
Still to decide: user in... Anna Maria Bigatti

11:47 CoCoALib Feature #1818 (In Progress): Implement FGLM

Implement FGLM algorithm for 0-dim ideals Anna Maria Bigatti

11:45 CoCoALib Feature #937 (Closed): LinDepMill: Mill for linear dependencies

Many years have passed. This class has been thoroughly used/tested.
It is used in the functions @ShapeLemma@ and @F... Anna Maria Bigatti

11:45 CoCoALib 2.00 hours (Feature #937 (Closed): LinDepMill: Mill for linear dependencies)

Anna Maria Bigatti

10:12 CoCoALib Feature #1667: GBasis over ZZ: port to CoCoALib

John Abbott wrote:
> The CoCoA-5 version is in @*prototype-GBZZ.cpkg5@*.
> I tried just one test, and the CoCoA-5 c... Anna Maria Bigatti

23 May 2024

16:42 CoCoALib Design #1816: printing rings

This is fine for me:... Anna Maria Bigatti

16:39 CoCoALib Design #1816: printing rings

Now it prints... Anna Maria Bigatti

16:36 CoCoALib Design #1816 (Resolved): printing rings

Follow up:
Me: no, we don't.
In fact, this highlights there is a different underlying implementation.
This is no... Anna Maria Bigatti

16:36 CoCoALib 1.00 hour (Design #1816 (Feedback): printing rings)

Anna Maria Bigatti

16:35 CoCoALib Design #1816 (Feedback): printing rings

From email by John Abbott:... Anna Maria Bigatti

10 May 2024

10:50 CoCoA-5 Design #1508: Initial ring

I'm undecided about changing the name (some beginner user might think that the name "QQxyz" has some interpretation b... Anna Maria Bigatti

10:02 CoCoA-5 Support #1650: Potentially confusing prompt: waiting for semicolon

> How about a very succinct *@[[forgot ";"?]]@*
yes! Anna Maria Bigatti

08 May 2024

16:56 CoCoA-5 Support #1603 (Rejected): Unhelpful behaviour in "compatibility mode": double error mesg

John Abbott wrote:
> I'm still with *won't fix* because we have far more important things to do with our time.
> Re... Anna Maria Bigatti

16:53 CoCoA-5 Support #1650: Potentially confusing prompt: waiting for semicolon

I don't mind the current message, but also... Anna Maria Bigatti

16:49 CoCoA-5 Support #1566 (Closed): What does rad do?

John Abbott wrote:
> There is no *@rad@* function in the current version of CoCoA-5.
> Close?
yes, it was a temp... Anna Maria Bigatti

16:49 CoCoA-5 0.25 hour (Support #1566 (Closed): What does rad do?)

Anna Maria Bigatti